libs/FRenderInit.c

   1 /* -*-c-*- */
   2 /* Copyright (C) 2002  Olivier Chapuis */
   3 /* This program is free software; you can redistribute it and/or modify
   4  * it under the terms of the GNU General Public License as published by
   5  * the Free Software Foundation; either version 2 of the License, or
   6  * (at your option) any later version.
   7  *
   8  * This program is distributed in the hope that it will be useful,
   9  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  10  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  11  * GNU General Public License for more details.
  12  *
  13  * You should have received a copy of the GNU General Public License
  14  * along with this program; if not, write to the Free Software
  15  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  16  */
  17
  18 /* ---------------------------- included header files ---------------------- */
  19
  20 #include "config.h"
  21
  22 #include <stdio.h>
  23
  24 #include <X11/Xlib.h>
  25
  26 #include "fvwmlib.h"
  27 #include "PictureBase.h"
  28 #include "FRenderInit.h"
  29
  30 /* ---------------------------- local definitions -------------------------- */
  31
  32 /* ---------------------------- local macros ------------------------------- */
  33
  34 /* ---------------------------- imports ------------------------------------ */
  35
  36 /* ---------------------------- included code files ------------------------ */
  37
  38 /* ---------------------------- local types -------------------------------- */
  39
  40 /* ---------------------------- forward declarations ----------------------- */
  41
  42 /* ---------------------------- local variables ---------------------------- */
  43
  44 Bool FRenderExtensionSupported = False;
  45 int FRenderErrorBase = -10000;
  46 int FRenderMajorOpCode = -10000;
  47 int FRenderAlphaDepth = 0;
  48
  49 /* ---------------------------- exported variables (globals) --------------- */
  50
  51 /* ---------------------------- local functions ---------------------------- */
  52
  53 void FRenderInit(Display *dpy)
  54 {
  55         int event_basep;
  56
  57         FRenderAlphaDepth = 8;
  58         if (!XRenderSupport || !(FRenderExtensionSupported = XQueryExtension(
  59                 dpy, "RENDER", &FRenderMajorOpCode, &event_basep,
  60                 &FRenderErrorBase)))
  61         {
  62                 int *pmf = NULL;
  63                 int i,n;
  64                 int alpha_depth = 0;
  65
  66                 FRenderErrorBase = -10000;
  67                 FRenderMajorOpCode = -10000;
  68                 FRenderExtensionSupported = 0;
  69                 pmf = XListDepths(dpy, DefaultScreen(dpy), &n);
  70                 if (pmf)
  71                 {
  72                         i = 0;
  73                         while(i < n)
  74                         {
  75                                 if (pmf[i] == 8)
  76                                 {
  77                                         alpha_depth = 8;
  78                                         i = n-1;
  79                                 }
  80                                 else if (pmf[i] >= 8 &&
  81                                          (pmf[i] < alpha_depth ||
  82                                           alpha_depth == 0))
  83                                 {
  84                                         alpha_depth = pmf[i];
  85                                 }
  86                                 i++;
  87                         }
  88                         XFree(pmf);
  89                 }
  90                 FRenderAlphaDepth = alpha_depth;
  91         }
  92 }
  93
  94
  95 int FRenderGetErrorCodeBase(void)
  96 {
  97         return FRenderErrorBase;
  98 }
  99
 100 int FRenderGetMajorOpCode(void)
 101 {
 102         return FRenderMajorOpCode;
 103 }
 104
 105 Bool FRenderGetExtensionSupported(void)
 106 {
 107         return FRenderExtensionSupported;
 108 }
 109
 110 int FRenderGetAlphaDepth(void)
 111 {
 112         return FRenderAlphaDepth;
 113 }
 114
 115 Bool FRenderGetErrorText(int code, char *msg)
 116 {
 117
 118         if (XRenderSupport)
 119         {
 120                 static char *error_names[] = {
 121                         "BadPictFormat",
 122                         "BadPicture",
 123                         "BadPictOp",
 124                         "BadGlyphSet",
 125                         "BadGlyph"
 126                 };
 127
 128                 if (code >= FRenderErrorBase &&
 129                     code <= FRenderErrorBase +
 130                     (sizeof(error_names) / sizeof(char *)) -1)
 131                 {
 132                         sprintf(msg, error_names[code - FRenderErrorBase]);
 133                         return 1;
 134                 }
 135         }
 136         return 0;
 137 }